Portrait of Tatiana Ehrenfest-Afanaseva (1876-1964) for Women’s History Month.
Tatyana Afanaseva (also written Afanasyeva) was a Russian mathematician who studied at the University of Göttingen. She married physicist Paul Ehrenfest in 1904 and they collaborated throughout their careers, most notably on a review of statistical mechanics.
Smithsonian Libraries has a handwritten article (later published in Physikalische Zeitschrift in 1913) by Afanaseva titled “Zur frage uber die Koncentrationsschwankungen in Radioactiven Losungen.” (“To the question of concentration fluctuations in radioactive solutions.”) (transl. approximate, courtesy Google Translate.)